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Differentiation and functional connectivity of fetal tectal transplants

Neural regeneration research 2023年第11期18卷 2325-2331页

作者： Alan r.Harvey School of Human Sciences The University of Western AustraliaLions Eye Instituteand Perron Institute for Neurological and Translational ScienceNedlandsWAAustralia

Data from studies analyzing the differentiation and functional connectivity of embryo nic neural tissue grafted into the mammalian nervous system has led to the clinical testing of the fetal graft approach in patients with neurodegenerative *** some success has been achieved,ethical concerns have led to a search for alternative therapeutic strategies,mostly exploring the use of neural precursors or neurons derived from pluripotent stem cells to replace damaged host neurons and restore lost *** more recent studies address questions of graft viability,differentiation,and connectivity similar to those posed by researchers in earlier fetal transplant work,thus reviews of the fetal graft literature may inform and help guide ongoing research in the stem cell/organoid *** brief review describes some key observations from research into the transplantation of neural tissue into the rat visual syste m,focusing on grafts of the fetal supe rior colliculus(tectal grafts) into neonatal or adult *** neonate hosts,grafts quickly develop connections with the underlying host mid b rain and attain a morphology typical of mature grafts by about 2 weeks.G rafts consistently contain numerous localized regions which,based on neurofibrillar staining,neuronal morphology(Golgi),neurochemistry,receptor expression,and glial architecture,are homologous to the stratum griseum supe rficiale of normal superior *** localized "patches" are also seen after explant culture and when donor tectal tissue is dissociated and reaggregated prior to *** almost all circumstances,host retinal innervation is restricted to these localized patches,but only those that are located adjacent to the graft surfa *** are formed and there is evidence of functional *** only exception occurs when Schwann cells are added to dissociated tecta prior to *** these co-grafts,the peripheral glia appear to compete with local target fa ctors a

关键词： axon regeneration differentiation embyronic grafts fetal tissue neural precursors retinotectal stem cells superior colliculus synaptogenesis transplantation

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Spectral Behavior and Flaring Activity ofⅡPeg in the Ultraviolet

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research in Astronomy and Astrophysics 2022年第8期22卷 191-197页

作者： M.r.Sanad Astronomy Department National Research Institute of Astronomy and GeophysicsHelwanCairoEgypt

We have studied the spectral behavior of theⅡPeg binary system in the ultraviolet band by using International Ultraviolet Explorer(IUE)observations over the period *** ultraviolet observations reveal indication of flare activity in both chromosphere and transition region with their enhanced emission *** and after the flare activity the ultraviolet emission lines show low,intermediate and high *** spectral behavior is compared with previous *** detect prominent flare activity in 1989,1990 and *** and after this period there is a gradual clear decrease in the level of *** reddening ofⅡPeg was determined from a 2200?absorption feature to be E(B-V)=0.10±*** ascertained the average mass loss rate to be≈1×10^(-8)M_(☉)yr^(-1),and an average ultraviolet luminosity to be≈6×10^(29)erg s^(-1).We attributed the spectral variations to a cyclic behavior of the underlying magnetic dynamo and the prominent activity can be interpreted by the model of a two-ribbon flare.

关键词： line:profiles magnetic fields stars:activity stars:flare ultraviolet:stars

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Aggregation-induced delayed fluorescence (AIDF) materials： a new break-through for nondoped OLEDs

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Science China Chemistry 2017年第12期60卷 1561-1562页

作者： Martin r. Bryce Department of Chemistry Durham UniversityDurham DH1 3LEUK

Nowadays, purely organic materials with delayed fluorescence （DF） are being enthusiastically developed and extensively utilized as light-emitting materials to fabricate OLEDs because of their high exciton utilization and metal-flee nature. These DF materials usually have a small single-triplet splitting （AEsT）, and the nonradiative triplet excitons （75%） can be converted into radiative singlet excitons via thermally promoted reverse intersystem crossing （rISC） processes,

关键词： Aggregation-induced delayed fluorescence (AIDF) materials a new break-through nondoped OLEDs

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纽顿轩新加坡

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世界建筑导报 2016年第6期31卷 94-96页

作者： Patrick bingham.Hall(摄影) 无不详 W0HA

这栋36层楼高的住宅楼坐落于城市中心高楼区的边缘,居民的视野能够越过面前低矮建筑群看到远处的自然保护区。该项目探索了在热带环境里的高层住宅实现方法。塔楼将几种环保设计融入到了当代建筑构成当中,为城市的天际线增添了一种新的... 详细信息

这栋36层楼高的住宅楼坐落于城市中心高楼区的边缘,居民的视野能够越过面前低矮建筑群看到远处的自然保护区。该项目探索了在热带环境里的高层住宅实现方法。塔楼将几种环保设计融入到了当代建筑构成当中,为城市的天际线增添了一种新的现代环保高楼模式。

关键词：新加坡城市中心环保设计自然保护区高层住宅热带环境建筑构成住宅楼

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Lattice Disorder and Photoluminescence of Er—Implanted AIN Crystalline Films

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Chinese Physics Letters 2002年第12期19卷 1844-1846页

作者：卢霏 r.Carius DepartmentofPhysics ShandongUniversityJinan250100 InstitutfurSchichtenundGrenzflachen(ISG-IT) ForschungszentrumJulichGmbHKFAD-52425Germany InstitutfuerPhotovoltaik(IPV) Forschungs

AlN crystalline films have been grown on SiC substrates by molecular beam epitaxy. Er doping was carried out by implantation with energy 180 keV to fluence of 1×10^15ions/cm^2. The as-implanted samples were then annealed at 650, 800, 950 and 1100°C respectively, to remove defects and to make Er ions optically active. The annealing up to 1100°C did not exert significant influence on either Er distribution or the profiles of implant-induced lattice damage. Strong 1.54 μm photoluminescence was observed in Er-implanted AlN at room temperature. The experimental results indicate that the photoluminescence lifetime can be improved by increasing the annealing temperature. The maximum photoluminescence lifetime was measured to be 2.3 ms.

关键词： photoluminescence Erbium annealing crystal lattices Implantation maladjustment Films

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removal of copper from a copper sulphate solution using an ultrasonic-electrolysis process

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Journal of Environmental Sciences 2002年第3期14卷 375-379页

作者： Faro.r WangY CollegeofresourcesandEnvironmentalEngineering EastChinaUniversityofS＆TShanghai200237China.E－mail：robina－farooq@yahoo.co.uk CollegeofresourcesandEnvironmentalEngineering EastChinaUniversityofS＆TShan

The application of ultrasonic\|electrolysis process for the removal of copper is studied. In the ultrasonic field cavitation acts as jets and agitates the solution and breaks the barrier layer between the cathode surface and the bulk of the solution. Thus increases metal deposition on the cathode surface. The results show that an ultrasonic field is successful for the removal of low copper concentrations in solution.

关键词： ultrasonic electrolysis sonication copper electrolysis

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Investigating the impact of the universal function of the nuclear proximity potential in heavy-ion fusion cross sections

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Communications in Theoretical Physics 2024年第5期76卷 86-93页

作者： r Gharaei E Sarvari Department of Physics Sciences FacultyHakim Sabzevari UniversityPO Box 397SabzevarIran Department of Physics Faculty of ScienceFerdowsi University of MashhadPO Box 91775-1436MashhadIran Science Faculty Department of PhysicsTarbiat Modares UniversityTehranIran

The fusion barriers and cross sections of 15 colliding systems with 320≤Z_(1)Z_(2)≤1512 are investigated in detail to understand the influence of the universal function of proximity potential formalism in the heavy-ion fusion *** realize this goal,we select three versions of the phenomenological proximity potentials,including Prox.77,Zhang 2013,and Guo 2013,to calculate the nucleus-nucleus *** experimental fusion cross sections for the selected reactions are analyzed using the standard coupled-channel calculations,including couplings to the low-lying 2^(+)and 3^(-)states in the target and *** calculated results show that the universal functions of the Guo 2013 and Prox.77 models provide the lowest and highest fusion barriers,*** addition,it is found that the height of the fusion barriers is enhanced by increasing the mass number of the projectile from light to heavy *** highest sensitivity to the mass number of the projectile belongs to the results of Prox.77.A discussion is also presented on the influence of the universal function on the radial behavior of the interaction potential in the allowed region for overlapping *** results reveal that the best fit to the experimental data of the fusion cross sections for the reactions involving light and medium nuclei is obtained using the universal function of the Zhang 2013 *** the heavier systems,the results of the Guo 2013 model at sub-barrier energies provide a good description of the available data.

关键词： fusion reactions proximity-type potentials universal function coupled-channel calculations

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Importance of heavy quark longitudinal structure function measurements at future circular collider energies

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Chinese Physics C 2021年第6期45卷 56-65页

作者： G.r.Boroun Physics Department Razi UniversityKermanshah 67149Ira

In this article,we consider the ratio of structure functions for heavy quark pair production at low values *** importance of this ratio for charm and beauty pair production is examined according to the Hadron Electron ring Accelerator(HErA)*** behavior of these ratios is considered due to the hard pomeron behavior of the gluon distribution *** results are in good agreement with the HErA *** this data to the range of new energies underscores the importance of these measurements for heavy *** ratio of charm and beauty structure functions at the proposed Large Hadron electron Collider(LHeC)is considered as a function of invariant center-of-mass *** top pair production this ratio is extracted with known kinematics of the LHeC and Future Circular Collider electron-hadron(FCC-eh)*** of the results obtained for the ratio of top structure functions in LHeC and FCC-eh are proportional to the specified inelasticity range.

关键词： future circular colliders heavy quarks longitudinal structure function

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Enhanced Feature Fusion Segmentation for Tumor Detection Using Intelligent Techniques

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Intelligent Automation & Soft Computing 2023年第3期35卷 3113-3127页

作者： r.radha r.Gopalakrishnan Department of Information and Communication Engineering Anna UniversityChennai600025TamilnaduIndia Department of Electrical and Electronics Engineering K.S.Rangasamy College of TechnologyTiruchengode637215TamilnaduIndia

In theﬁeld of diagnosis of medical images the challenge lies in tracking and identifying the defective cells and the extent of the defective region within the complex structure of a brain *** the defective cells precisely during the diagnosis phase helps toﬁght the greatest exterminator of *** detec-tion of these defective cells requires an accurate computer-aided diagnostic system(CAD)that supports early treatment and promotes survival rates of *** ear-lier version of CAD systems relies greatly on the expertise of radiologist and it con-sumed more time to identify the defective *** manuscript takes the efﬁcacy of coalescing features like intensity,shape,and texture of the magnetic resonance image(MrI).In the Enhanced Feature Fusion Segmentation based classiﬁcation method(EEFS)the image is enhanced and segmented to extract the prominent *** bring out the desired effect the EEFS method uses Enhanced Local Binary Pattern(EnLBP),Partisan Gray Level Co-occurrence Matrix Histogram of Oriented Gradients(PGLCMHOG),and iGrab cut method to segment *** prominent features along with deep features are coalesced to provide a single-dimensional fea-ture vector that is effectively used for *** coalesced vector is used with the existing classiﬁers to compare the results of these classiﬁers with that of the gen-erated *** generated vector provides promising results with commendably less computatio nal time for pre-processing and classiﬁcation of Mr medical images.

关键词： Enhanced local binary pattern level iGrab cut method magnetic resonance image computer aided diagnostic system enhanced feature fusion segmentation enhanced local binary pattern

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Copy Move Forgery Detection Using Novel Quadsort Moth Flame Light Gradient Boosting Machine

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Computer Systems Science & Engineering 2023年第5期45卷 1577-1593页

作者： r.Dhanya r.Kalaiselvi Department of Computer Applications Noorul Islam Centre for Higher EducationNagercoil629180India Department of Computer Science Engineering Noorul Islam Centre for Higher EducationNagercoil629180India

A severe problem in modern information systems is Digital media tampering along with fake *** though there is an enhancement in image development,image forgery,either by the photographer or via image manipulations,is also done in *** researches have been concentrated on how to identify such manipulated media or information manually along with automatically;thus conquering the complicated forgery methodologies with effortlessly obtainable technologically enhanced ***,high complexity affects the developed ***,it is complicated to resolve the issue of the speed-accuracy *** tackling these challenges,this article put forward a quick and effective Copy-Move Forgery Detection(CMFD)system utilizing a novel Quad-sort Moth Flame(QMF)Light Gradient Boosting Machine(QMF-Light GBM).Utilizing Borel Transform(BT)-based Wiener Filter(BWF)and resizing,the input images are initially pre-processed by eliminating the noise in the proposed *** that,by utilizing the Orientation Preserving Simple Linear Iterative Clustering(OPSLIC),the pre-processed images,partitioned into a number of grids,are ***,as of the segmented images,the significant features are extracted along with the feature’s distance is calculated and matched with the input ***,utilizing the Union Topological Measure of Pattern Diversity(UTMOPD)method,the false positive matches that took place throughout the matching process are *** that,utilizing the QMF-Light GBM visualization,the visualization of forged in conjunction with non-forged images is *** extensive experiments revealed that concerning detection accuracy,the proposed system could be extremely precise when contrasted to some top-notch approaches.

关键词： Borel transform based wiener filter(BWF) orientation preserving simple linear iterative clustering(OPSLIC) keypoint features block features outlier detection

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